Māris kļaviņŠ, azamat azizov, JĀnis zaļoksnis environment, pollution, development: the case of uzbekistan

particularly in view of its low toxicity, is not considered to be 
hazardous to living organisms. This substance is odourless and 
tasteless, chemically inert. In small amounts it is released in nitric 
acid production process, it is used as an anaesthetic agent in 
medicine, and as an inert gas in technology. Toxic effects have not 
been established. N
2
O is released into the atmo sphere mainly as a 
result of nitrogen and organic matter decomposition reactions and 
its annual emissions amount to 100 million tons a year. The total 
amount of N
2
O in the atmo sphere is 2000 million tons. Its life period 
is 20 years, and in the last decades N
2
O content in the atmo sphere is 

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7. AIR POLLUTION
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increasing by 0.3% per year. Therefore, the N
2
O is considered to be 
one of the most important greenhouse gases.